* {
    margin: 0;
    padding: 0;
}

img {
    border: 0;
    display: block;
}

#nav {
    width: 100%;
    height: 72px;
    background: #ffffff;
    margin: 0 auto;
}

.nav_01 {
    width: 553px;
    height: 78px;
    float: left;
}

.nav_01 img {
    margin-left: 175px;
}

.nav_02 {
    float: left;
    width: 488px;
    height: 78px;
}

.nav_03 {
    float: left;
    margin-left: 80px;
    width: 304px;
    height: 78px;
    position: relative;
}

.nav_03 p {
    margin: 10px 0 0 60px;
    color: #a19589;
}

.nav_03 a {
    text-decoration: none;
    color: #a19589;
    font-size: 12px;
}

.input {
    width: 150px;
    height: 20px;
    position: absolute;
    top: 52%;
    outline: none;
}

.nav_03_01 {
    position: absolute;
    width: 26px;
    height: 20px;
    background: url(tx_img/search-btn[1].png) no-repeat;
    right: 150px;
    bottom: 15px;
}

.nav_02 ul li {
    list-style: none;
}

.nav_02 ul li a {
    display: block;
    width: 100%;
    height: 100%;
    margin: 2px;
}

.nav_02_04 a{
    margin: 0;
}

.nav_02 ul {
    width: auto;
    height: 78px;
}

.nav_02_01 {
    float: left;
    width: 98px;
    height: 78px;
    background: url(tx_img/nav[1].png) no-repeat;
}

.nav_02_02 {
    float: left;
    width: 122px;
    height: 78px;
    background: url(tx_img/nav[1].png) no-repeat;
    background-position: -98px;
}

.nav_02_03 {
    float: left;
    width: 144px;
    height: 78px;
    background: url(tx_img/nav[1].png) no-repeat;
    background-position: -224px;
}

.nav_02_04 {
    float: left;
    width: 118px;
    height: 78px;
    background: url(tx_img/nav[1].png) no-repeat;
    background-position: -370px;
}

.nav_02 .nav_02_01:hover {
    background: url(tx_img/nav-on[1].png) no-repeat;
}

.nav_02 .nav_02_02:hover {
    background: url(tx_img/nav-on[1].png) no-repeat;
    background-position: -100px;
}

.nav_02 .nav_02_03:hover {
    background: url(tx_img/nav-on[1].png) no-repeat;
    background-position: -224px;
}

.nav_02 .nav_02_04:hover {
    background: url(tx_img/nav-on[1].png) no-repeat;
    background-position: -370px;
}

.nav_03_01 a{
    display: block;
    width: 26px;
    height: 20px;
}

.nav_03_01 a:hover{
    background: url(tx_img/search-btn[1].png) no-repeat;
    background-position: 0 -20px;
}

.left {
    width: 778px;
    height: 1590px;
    background: #f2f1ef;
    margin-left: 186px;
    float: left;
}

.left_01 {
    width: 778px;
    height: 1592px;
}

.right {
    width: 266px;
    height: 1590px;
    background: #fcfafb;
    float: right;
    margin-right: 186px;
}

#banner {
    width: 100%;
    height: 100%;
}

.banner_pic {
    width: 100%;
    height: 359px;
    position: relative;
    overflow: hidden;
}

.banner_pic img {
    position: absolute;
    left: 50%;
    top: 0;
    margin-left: -720px;
}

.banner_text {
    width: 1046px;
    height: 36px;
    padding-left: 20px;
    margin: 0 auto;
    line-height: 36px;
    font-size: 14px;
    color: #000;
    position: relative;
}

.banner_text_p {
    width: 94px;
    height: 16px;
    position: absolute;
    bottom: 56px;
    right: 0;
}

.banner_text_p span{
    display: block;
    width: 16px;
    height: 16px;
    float: left;
    margin-right: 10px;
    background: url(tx_img/banner-counter[1].png) no-repeat;
}

.banner_text_i i{
    display: inline-block;
    vertical-align: middle;
    margin-right: 5px;
    width: 20px;
    height: 20px;
    background: url(tx_img/icon-speaker[1].png) no-repeat;
}

.banner_text .sp1:hover {
    background: url(tx_img/banner-counter-on[1].png);
}

.banner_text .sp2 {
    width: 16px;
    height: 16px;
    background-position: -26px;
}

.banner_text .sp2:hover {
    background: url(tx_img/banner-counter-on[1].png);
    background-position: -26px;
}

.banner_text .sp4 {
    width: 16px;
    height: 16px;
    margin-right: 0;
    background-position: -52px;
}

.banner_text .sp3:hover {
    background: url(tx_img/banner-counter-on[1].png);
    background-position: -52px;
}

.banner_text .sp4 {
    width: 16px;
    height: 16px;
    background-position: -78px;
}

.banner_text .sp4:hover {
    background: url(tx_img/banner-counter-on[1].png);
    background-position: -78px;
}

.banner_text em {
    display: block;
    width: 40px;
    height: 21px;
    background: url(tx_img/icon-live-open[1].png);
    position: absolute;
    left: 50%;
    bottom: 0px;
    margin-left: -20px;
}

.banner_text em:hover {
    background: url(tx_img/slider-close[1].png) no-repeat;
    background-position: 0 2px;
}

/* content */
.content {
    width: 1066px;
    height: 100%;
    background: #f2f1ef;
    margin: 0 auto;
    overflow: hidden;
}

#main {
    width: 100%;
    height: 100%;
    background: #d6dae3;
    overflow: hidden;
}

.content_left {
    width: 780px;
    height: 100%;
    float: left;
}

.content_right {
    width: 266px;
    height: 500px;
    float: left;
    margin-left: 20px;
}

.left_one {
    height: 314px;
    width: 740px;
    padding: 20px 20px 20px 20px;
}

.left_one h2 {
    margin-bottom: 20px;
    font-size: 20px;
    font-weight: normal;
    position: relative;
}

.left_one h2 i{
    display: inline-block;
    width: 20px;
    height: 20px;
    background: url(tx_img/icon-lesson[1].png) no-repeat;
    margin-right: 10px;
    vertical-align: middle;
    font-size: 18px;
}

.left_one h2 a {
    font-size: 12px;
    position: absolute;
    right: 0;
    top: 50%;
    margin-top: -6px;
}

.left_one_more {
    text-decoration: none;
    float: right;
    font-size: 9px;
}

.left_one_list dl {
    float: left;
    width: 225px;
}

.left_one_list img {
    /* margin-top: 20px; */
    width: 100%;
    height: 100%;
}

.left_one_list h3 {
    font-size: 14px;
    font-weight: normal;
    width: 100%;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.left_one_list p {
    line-height: 22px;
    font-size: 12px;
    width: 100%;
    color: #888;
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.left_one_list dd {
    padding: 10px;
}

.left_one_list_center {
    margin: 0 30px;
}

.left_one_list_pic1 {
    border-bottom: 3px solid #20c0f0;
}

.left_one_list_pic2 {
    border-bottom: 3px solid #f5a544;
}

.left_one_list_pic3 {
    border-bottom: 3px solid #8cbd00;
}